Auth_Basic & Yii Web Services

I have an nginx with auth_basic and yii web service don´t generates in temp the file wsdl-root-… If I disabled the basic auth and try again generate the file in temp. when i enabled the auth_basic again, works fine.

I try to disable ‘soap.wsdl_cache_enabled’, ‘0’) and ‘soap.wsdl_cache_ttl’, ‘0’) but don´t works, someone have a solution?